diff options
Diffstat (limited to 'drivers/acpi/sleep.c')
| -rw-r--r-- | drivers/acpi/sleep.c | 76 |
1 files changed, 68 insertions, 8 deletions
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c index ca191ff97844..1d661b5c3287 100644 --- a/drivers/acpi/sleep.c +++ b/drivers/acpi/sleep.c @@ -17,6 +17,8 @@ #include <linux/suspend.h> #include <linux/reboot.h> #include <linux/acpi.h> +#include <linux/module.h> +#include <linux/pm_runtime.h> #include <asm/io.h> @@ -26,6 +28,24 @@ #include "internal.h" #include "sleep.h" +static unsigned int gts, bfs; +module_param(gts, uint, 0644); +module_param(bfs, uint, 0644); +MODULE_PARM_DESC(gts, "Enable evaluation of _GTS on suspend."); +MODULE_PARM_DESC(bfs, "Enable evaluation of _BFS on resume".); + +static u8 wake_sleep_flags(void) +{ + u8 flags = ACPI_NO_OPTIONAL_METHODS; + + if (gts) + flags |= ACPI_EXECUTE_GTS; + if (bfs) + flags |= ACPI_EXECUTE_BFS; + + return flags; +} + static u8 sleep_states[ACPI_S_STATE_COUNT]; static void acpi_sleep_tts_switch(u32 acpi_state) @@ -243,6 +263,7 @@ static int acpi_suspend_enter(suspend_state_t pm_state) { acpi_status status = AE_OK; u32 acpi_state = acpi_target_sleep_state; + u8 flags = wake_sleep_flags(); int error; ACPI_FLUSH_CPU_CACHE(); @@ -250,7 +271,7 @@ static int acpi_suspend_enter(suspend_state_t pm_state) switch (acpi_state) { case ACPI_STATE_S1: barrier(); - status = acpi_enter_sleep_state(acpi_state); + status = acpi_enter_sleep_state(acpi_state, flags); break; case ACPI_STATE_S3: @@ -265,7 +286,7 @@ static int acpi_suspend_enter(suspend_state_t pm_state) acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1); /* Reprogram control registers and execute _BFS */ - acpi_leave_sleep_state_prep(acpi_state); + acpi_leave_sleep_state_prep(acpi_state, flags); /* ACPI 3.0 specs (P62) says that it's the responsibility * of the OSPM to clear the status bit [ implying that the @@ -529,27 +550,30 @@ static int acpi_hibernation_begin(void) static int acpi_hibernation_enter(void) { + u8 flags = wake_sleep_flags(); acpi_status status = AE_OK; ACPI_FLUSH_CPU_CACHE(); /* This shouldn't return. If it returns, we have a problem */ - status = acpi_enter_sleep_state(ACPI_STATE_S4); + status = acpi_enter_sleep_state(ACPI_STATE_S4, flags); /* Reprogram control registers and execute _BFS */ - acpi_leave_sleep_state_prep(ACPI_STATE_S4); + acpi_leave_sleep_state_prep(ACPI_STATE_S4, flags); return ACPI_SUCCESS(status) ? 0 : -EFAULT; } static void acpi_hibernation_leave(void) { + u8 flags = wake_sleep_flags(); + /* * If ACPI is not enabled by the BIOS and the boot kernel, we need to * enable it here. */ acpi_enable(); /* Reprogram control registers and execute _BFS */ - acpi_leave_sleep_state_prep(ACPI_STATE_S4); + acpi_leave_sleep_state_prep(ACPI_STATE_S4, flags); /* Check the hardware signature */ if (facs && s4_hardware_signature != facs->hardware_signature) { printk(KERN_EMERG "ACPI: Hardware changed while hibernated, " @@ -730,6 +754,40 @@ int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p) #ifdef CONFIG_PM_SLEEP /** + * acpi_pm_device_run_wake - Enable/disable wake-up for given device. + * @phys_dev: Device to enable/disable the platform to wake-up the system for. + * @enable: Whether enable or disable the wake-up functionality. + * + * Find the ACPI device object corresponding to @pci_dev and try to + * enable/disable the GPE associated with it. + */ +int acpi_pm_device_run_wake(struct device *phys_dev, bool enable) +{ + struct acpi_device *dev; + acpi_handle handle; + + if (!device_run_wake(phys_dev)) + return -EINVAL; + + handle = DEVICE_ACPI_HANDLE(phys_dev); + if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &dev))) { + dev_dbg(phys_dev, "ACPI handle has no context in %s!\n", + __func__); + return -ENODEV; + } + + if (enable) { + acpi_enable_wakeup_device_power(dev, ACPI_STATE_S0); + acpi_enable_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number); + } else { + acpi_disable_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number); + acpi_disable_wakeup_device_power(dev); + } + + return 0; +} + +/** * acpi_pm_device_sleep_wake - enable or disable the system wake-up * capability of given device * @dev: device to handle @@ -770,10 +828,12 @@ static void acpi_power_off_prepare(void) static void acpi_power_off(void) { + u8 flags = wake_sleep_flags(); + /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */ printk(KERN_DEBUG "%s called\n", __func__); local_irq_disable(); - acpi_enter_sleep_state(ACPI_STATE_S5); + acpi_enter_sleep_state(ACPI_STATE_S5, flags); } /* @@ -788,13 +848,13 @@ static void __init acpi_gts_bfs_check(void) { acpi_handle dummy; - if (ACPI_SUCCESS(acpi_get_handle(ACPI_ROOT_OBJECT, METHOD_NAME__GTS, &dummy))) + if (ACPI_SUCCESS(acpi_get_handle(ACPI_ROOT_OBJECT, METHOD_PATHNAME__GTS, &dummy))) { printk(KERN_NOTICE PREFIX "BIOS offers _GTS\n"); printk(KERN_NOTICE PREFIX "If \"acpi.gts=1\" improves suspend, " "please notify linux-acpi@vger.kernel.org\n"); } - if (ACPI_SUCCESS(acpi_get_handle(ACPI_ROOT_OBJECT, METHOD_NAME__BFS, &dummy))) + if (ACPI_SUCCESS(acpi_get_handle(ACPI_ROOT_OBJECT, METHOD_PATHNAME__BFS, &dummy))) { printk(KERN_NOTICE PREFIX "BIOS offers _BFS\n"); printk(KERN_NOTICE PREFIX "If \"acpi.bfs=1\" improves resume, " |